Function: cellHarness()

cellHarness<T>(setup): CellHarness<T>

Defined in: testing.ts:76

Build a cell graph under a disposable owner and keep it live.

setup runs inside createRoot (cells need an owner), and every Cell found among the returned object's values is watched by a passive effect — without one, a graph is lazy (pull-only) and effects like auto-recompute never fire the way they do under a rendering app. Call dispose() in the test's cleanup; better, register it once:

let h: CellHarness<AppGraph>;
afterEach(() => h?.dispose());

Type Parameters

T

T extends object

Parameters

setup

() => T

Returns

CellHarness<T>